Ontario Chaffey Community Show Band performs a free and open to the public concert, “Swing, Swing, Swing,” 7:30 p.m. Monday, May 11 at Ontario Town Square, where Euclid Avenue meets B and C streets. Guest performers include Shelia Ruff, Loren Martinez, Peter Gutierrez and Homero Chavez, with Show Band solo musicians Steve Collins on flugelhorn and Director Pat Arnold on vocal and tenor sax.